01:119:115 Lecture Notes - Lecture 10: Sister Chromatids, Nucleic Acid Double Helix, Characteristic Class

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: Stern Cardinale

Document Summary

Cell theory: all living things are made of cells, cells are the smallest unit of life, cells come only from other cells by cell division, some cells are terminally differentiated. 3 functions of cell division: cell division=cell reproduction: reproduction, growth and development, tissue renewal. Genome: a cell"s total genetic material: prokaryotes: single dna molecule, eukaryotes: several dna molecule. Haploid cell (n): 1 copy of each chromosome: gametes: (humans: 23 chromosomes, reproductive cells. Diploid cell (2n): 2 copies of each chromosome: somatic cells (humans: 46 chromosomes, paired in homologous chromosomes, one inherited from mom and one from dad. During preparation for mitosis, each chromosome is doubled! 2 sister chromatids are identical: g2 phase: second gap; shorter. Centrosome made of 2 centrioles (9 sets of 3 microtubules arranged ring) duplicate to make mitotic spindle: mitotic (m) phase: mitosis + cytokinesis shortest, prophase. Chromosomes condense and start to become visible.